{"cve":"CVE-2019-3875","nvd":{"published":"2019-06-12T14:29:04.760","modified":"2026-06-17T02:35:47.050","status":"Modified","description":"A vulnerability was found in keycloak before 6.0.2. The X.509 authenticator supports the verification of client certificates through the CRL, where the CRL list can be obtained from the URL provided in the certificate itself (CDP) or through the separately configured path. The CRL are often available over the network through unsecured protocols ('http' or 'ldap') and hence the caller should verify the signature and possibly the certification path. Keycloak currently doesn't validate signatures on CRL, which can result in a possibility of various attacks like man-in-the-middle.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","score":4.8},"cwes":["CWE-295","CWE-345"],"references":["http://www.securityfocus.com/bid/108748","https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3875","http://www.securityfocus.com/bid/108748","https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3875"],"products":["redhat:keycloak","redhat:single_sign-on"],"source":"nvd","synced_at":"2026-10-19T20:57:00.690689396+00:00"},"epss":{"cve":"CVE-2019-3875","score":0.00291,"percentile":0.21647,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-38cg-gg9j-q9j9","url":"https://osv.dev/vulnerability/GHSA-38cg-gg9j-q9j9","summary":"Improper Certificate Validation and Insufficient Verification of Data Authenticity in Keycloak","modified":"2023-11-08T04:01:34.890139Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-core","purl":"pkg:maven/org.keycloak/keycloak-core","ranges":["<=6.0.1"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}